acallosal
adjective
acal·lo·sal
| \ ˌā-kə-ˈlō-səl, -ka-
\
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Medical Definition of acallosal
: lacking a corpus callosum
the acallosal brain … the observation that acallosal children and adults are very clumsy in tasks that require bi-manual cooperation.— John Stirling, Introducing Neuropsychology, 2002